@Override
    protected Set<String> create(String[] elements) {
      ImmutableSet.Builder<String> builder =
          ImmutableSet.builderWithExpectedSize(newHashSet(elements).size());
      for (String e : elements) {
        builder.add(e);
      }
      return builder.build();
    }
  }

    @Override
    protected Set<String> create(String[] elements) {
      ImmutableSet.Builder<String> builder =
          ImmutableSet.builderWithExpectedSize(newHashSet(elements).size());
      for (String e : elements) {
        builder.add(e);
      }
      return builder.build();
    }
  }

      ImmutableSet<Integer> unused = builder.build();
    }
  }

  @GwtIncompatible("Builder impl")
  public void testPresizedBuilderDedups() {
    ImmutableSet.Builder<String> builder = ImmutableSet.builderWithExpectedSize(4);
    builder.add("a");
    assertEquals(1, builder.size);
    builder.add("a");
    assertEquals(1, builder.size);
    builder.add("b", "c", "d");
    assertEquals(4, builder.size);

          return Indexed.this;
        }
      };
    }
  }

  public static <E> Builder<E> builder() {
    return new Builder<E>();
  }

  public static <E> Builder<E> builderWithExpectedSize(int size) {
    return new Builder<E>(size);
  }

  public static class Builder<E> extends ImmutableCollection.Builder<E> {
    // accessed directly by ImmutableSortedSet
    final ArrayList<E> contents;

    return new RegularImmutableMap<>(entries);
  }

  public static <K, V> Builder<K, V> builder() {
    return new Builder<K, V>();
  }

  public static <K, V> Builder<K, V> builderWithExpectedSize(int expectedSize) {
    return new Builder<K, V>(expectedSize);
  }

  static <K, V> Entry<K, V> entryOf(K key, V value) {
    checkEntryNotNull(key, value);
    return Maps.immutableEntry(key, value);

    Collections.reverse(list);
    return unsafeDelegateList(list);
  }

  public static <E> Builder<E> builder() {
    return new Builder<E>();
  }

  public static <E> Builder<E> builderWithExpectedSize(int expectedSize) {
    return new Builder<E>(expectedSize);
  }

  public static final class Builder<E> extends ImmutableCollection.Builder<E> {
    private final ArrayList<E> contents;

   */
  private static final double HASH_FLOODING_FPP = 0.001;

  public void testReuseBuilderReducingHashTableSizeWithPowerOfTwoTotalElements() {
    ImmutableSet.Builder<Object> builder = ImmutableSet.builderWithExpectedSize(6);
    builder.add(0);
    ImmutableSet<Object> unused = builder.build();
    ImmutableSet<Object> subject = builder.add(1).add(2).add(3).build();
    assertFalse(subject.contains(4));
  }

  }

  @GwtIncompatible
  public void testBuilderExactlySizedReusesArray() {
    ImmutableMap.Builder<Integer, Integer> builder = ImmutableMap.builderWithExpectedSize(10);
    Object[] builderArray = builder.alternatingKeysAndValues;
    for (int i = 0; i < 10; i++) {
      builder.put(i, i);
    }
    Object[] builderArrayAfterPuts = builder.alternatingKeysAndValues;

   * but not exactly, the number of entries added to the builder.
   *
   * @since 23.1
   */
  public static <K, V> Builder<K, V> builderWithExpectedSize(int expectedSize) {
    checkNonnegative(expectedSize, "expectedSize");
    return new Builder<>(expectedSize);
  }

  /**

   * but not exactly, the number of elements added to the builder.
   *
   * @since 23.1
   */
  public static <E> Builder<E> builderWithExpectedSize(int expectedSize) {
    checkNonnegative(expectedSize, "expectedSize");
    return new ImmutableList.Builder<>(expectedSize);
  }

  /**